.root {
  padding-top: 60px;
  padding-left: 40px;
  width:100%;
  height: 100%;
  box-sizing: border-box;
  overflow: auto;
  position: relative;
}

.drop{
position: absolute;
top:calc(100% - 50px);
left:calc(100% - 50px);
width:200px;
height:200px;
background-color: blue;
z-index: 1000;
}